Shuttle Tragedy

NASA officials had one word for the simulated launch of the space
shuttle at Cape Canaveral last week: "Super!" Then disaster struck. For
reasons yet to be explained, five Rockwell International technicians
removed an access panel and entered a rear section of the orbiter above
the engine. A few minutes later, they began keeling over from lack of
oxygen. One technician, John Bjornstad, 50, died in a helicopter en
route to a hospital, and another, Forrest Cole, was in critical
condition.

The reason for the mishap may not be known until NASA and Rockwell
officials complete their separate investigations....